Hay, napakasama nito talaga kasi nakaka-confuse sa bata! Usually I document it muna with photos, then I notify the teacher right away para alam nila ang issue, minsan printing error lang or batch problem kaya importante i-flag agad bago pa mag-advance ang lesson. You're doing the right thing by catching these things para sa learning ng bata, honestly kailangan talaga ng parents na maging observant like you!